Product Description:

The S33ANNH-RNVM-00 brushless servo motor is manufactured by Pacific Scientific and belongs to the S Brushless Motors series. As a 6-pole neodymium magnet design, it delivers closed-loop motion for positioning tables, feeders, and other industrial axes that require compact torque density. The unit follows a NEMA mounting standard, uses high-voltage construction, and relies on a size 21 frameless resolver for primary feedback, allowing the matching drive to monitor rotor position without external encoders.

For continuous operation at stall, the motor produces 5.3 Nm of torque, a capability provided by its three-stack stator and rare-earth rotor. The mechanical interface fits the NEMA 34 frame size, so it bolts directly to standard automation gearboxes and plates. Electromagnetic behavior is influenced by a phase-to-phase inductance of 17.0 mH and a resistance of 5.2 Ohms; together these values inform drive current-loop tuning and contribute to copper losses at rated load. The torque constant is 1.5 Nm/ARMS, meaning each ampere of sinusoidal current produces 1.5 newton-meters, which simplifies sizing of the power stage and current sensors.

When rapid indexing or shock loading is required, the rotor can generate up to 15.3 Nm of peak torque for short intervals without exceeding thermal limits. Back electromotive force is characterized by a voltage constant of 0.94 VRMS/rad/sec, allowing the controller to predict generated voltage during deceleration. Dynamic response is supported by a rotor inertia of 0.48×10⁻³ kg·m², while overall mass remains 6.5 kg, which eases installation on moving carriages. The motor is supplied without a holding brake, uses a Viton shaft ring for fluid resistance, and connects through a motor-mounted MS connector. It is wound to type A construction and does not include secondary feedback.